* {
    box-sizing: border-box;
}

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.border-bottom {
    position: relative;
}

.border-bottom::after {
    content: "";
    position: absolute;
    width: 200%;
    height: 1px;
    background-color: #000;
    transform: scale(0.5);
    bottom: 0;
    left: -50%;
}
